CVE-2020-14509: 
Wibu-Systems CodeMeter vulnerability analysis and mitigation

CVE-2020-14509 is a critical buffer access vulnerability discovered in CodeMeter, a license management software developed by Wibu-Systems. The vulnerability affects all versions prior to 7.10a of CodeMeter Runtime, which is widely used in industrial control systems (ICS) products from various vendors including Siemens, Rockwell Automation, and others. The vulnerability was discovered and reported by Sharon Brizinov and Tal Keren of Claroty (CISA Advisory).

The vulnerability is characterized as a buffer access with incorrect length value (CWE-805) where the packet parser mechanism does not verify length fields. This memory corruption vulnerability allows an attacker to send specially crafted packets to exploit the system. The vulnerability has received the highest possible CVSS v3 base score of 10.0 (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H), indicating its critical severity and ease of exploitation (CISA Advisory, Tenable Blog).

Successful exploitation of this vulnerability could allow an attacker to achieve remote code execution, alter and forge license files, cause denial-of-service conditions, read heap data, and prevent normal operation of third-party software dependent on CodeMeter. The vulnerability's impact is particularly severe as it affects industrial control systems across multiple critical infrastructure sectors worldwide (CISA Advisory, Threatpost).

The vulnerability is remotely exploitable with low attack complexity and requires no user interaction or special privileges. An attacker can exploit this vulnerability by sending specially crafted packets to the target system. As of the initial disclosure, no known public exploits specifically targeting this vulnerability were reported (CISA Advisory).

Wibu-Systems released patches addressing this vulnerability in CodeMeter Runtime version 7.10a. The recommended mitigations include updating to the latest version of CodeMeter Runtime, running CodeMeter only as client, utilizing the new REST API instead of the internal WebSockets API, disabling the WebSockets API, and applying AxProtector. Additionally, CISA recommends minimizing network exposure for control system devices, locating control systems behind firewalls, and using secure methods like VPNs for remote access (CISA Advisory).

The vulnerability garnered significant attention in the industrial cybersecurity community due to its critical severity and widespread impact across multiple vendors. Major ICS vendors including ABB, Bosch, CODESYS, Rockwell, Schneider Electric, and Siemens issued their own security advisories to address the vulnerability in their products (CISA Advisory, Threatpost).